Air conditioner



FIG. 1 is a perspective view of air conditioner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, a left side view being a mirror image; and,

FIG. 5 is a top view thereof, a bottom view being a mirror image.

The broken lines shown represent unclaimed subject matter of an air conditioner and form no part of the claimed design. The dot and dashed lines mean a boundary between the claimed portion and the non-claimed portion. 

CLAIM The ornamental design for an air conditioner, as shown and described. 